The best US state to live in 2018 is Iowa. The worst state to live in the US is Louisiana. I took eight criteria, which are preferred by Americans and combined them together, getting a list of the best US states to live in. But I also went one step further by determining which state has a Democratic and Republican Governor currently (before the midterm elections in this year 2018). That led to an interesting comparison, even that there is much more Republican states exist compared with the Democrats. Republican states are 53% preferred. Democrats win on healthcare and crime, while the republicans win on education, economy, opportunity, infrastructure, fiscal stability and quality of life.